1/* 2 * LibXDiff by Davide Libenzi ( File Differential Library ) 3 * Copyright (C) 2003 Davide Libenzi 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 * Davide Libenzi <davidel@xmailserver.org> 20 * 21 */ 22 23#if !defined(XMACROS_H) 24#define XMACROS_H 25 26 27#define GR_PRIME 0x9e370001UL 28 29 30#define XDL_MIN(a, b) ((a) < (b) ? (a): (b)) 31#define XDL_MAX(a, b) ((a) > (b) ? (a): (b)) 32#define XDL_ABS(v) ((v) >= 0 ? (v): -(v)) 33#define XDL_ISDIGIT(c) ((c) >='0' && (c) <='9') 34#define XDL_HASHLONG(v, b) (((unsigned long)(v) * GR_PRIME) >> ((CHAR_BIT * sizeof(unsigned long)) - (b))) 35#define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0) 36#define XDL_LE32_PUT(p, v) \ 37do { \ 38 unsigned char *__p = (unsigned char *) (p); \ 39 *__p++ = (unsigned char) (v); \ 40 *__p++ = (unsigned char) ((v) >> 8); \ 41 *__p++ = (unsigned char) ((v) >> 16); \ 42 *__p = (unsigned char) ((v) >> 24); \ 43} while (0) 44#define XDL_LE32_GET(p, v) \ 45do { \ 46 unsigned char const *__p = (unsigned char const *) (p); \ 47 (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \ 48 ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \ 49} while (0) 50 51 52#endif/* #if !defined(XMACROS_H) */ 53